Metal-planing machine



(No Model.) 2 Sheets-Sheet I. A. CLARKE.

METAL PLANING MACHINE. No. 346,090. Patented July 27, 1886 N PETIISMumnphw. \Vubinlion. D. C

(No Model.) 2 Sheets-Sheet 2.

A. CLARKE.

METAL PLANING MACHINE. v No. 346,090. Patented Jul 27, 1886.

l lllll Wl'LFlE5 5E5 l VEFPLUR- Jam/4g mi PATENT OFFICE.

ALFRED CLARKE, OF LOWELL, MASSACHUSETTS.

METAL-PLANING MACHINE.

SPECIFICATION forming part of Letters Patent No. 346,090, dated July27,1886.

Application filed December 4, 1885. Serial No. 184,692. (No model.)

To all'whom it may concern-.-

Be it known that I, ALFRED CLARKE, a citizen of the United States,residing at Lowell, in the county of Middlesex and Commonwealth ofMassachusetts, have invented a certain new and useful Improvement inMeta Planing Machines, of which the following is a specification.

My invention relates to metal-planing machines, and has for its objectto give a quick return motion to the platen; and it consists in thedevices and combinations hereinafter described and claimed.

In the accompanying drawings, Figure 1 is an isometric view of a planingmachine provided with my in1provement; Fig. 2, a horizontal section inthe plane of the axis of the main shaft; Fig. 3, an isometric view of apart of the shipping mechanism, omitting the clutchpulley andclutch-gear and mechanism for operating the clutch; Fig. 4., a verticalcross-section through the reversing-shaft and the adjusting-collars;Fig. 5, a side elevation of part of the platen with the shippingdogs andshipping-lever.

The bed A, platen B, crossslide 0, toolholder D, and the various devicesfor adjusting the position of the tool or cutter are of the usualconstruction and operation. The platen B is provided with a rack, b, onits under surface, into which takes a pinion, e, on the jackshaft E toreciprocate the platen in the usual manner. A large gear, G, is securedto the end of the jack-shaft, and takes into a pinion,

H, secured by a spline, h, to the hollow reversing-shaft I, the rotationof which rotates the jack-shaft and gives a reciprocating mo tion to theplaten. Within the hollow shaft I is a central solid rod, J. A collar,L, sliding on the hollow shaft I is provided with an annular groove, Z,and is secured to the rod J by a pin, 13, which passes through saidhollow shaft in a slot, 43, formed in the same and through said rod J. Abcll-crank lever, .M, is forked at its upper end at m, and is providedwith pins m, which enter the annular groove Z. Said bellcrank lever M ispivoted in a bracket, mfi'bolted to a cross girt, a, of the frame A.Thelower end of said bell-crank lever M is pivoted to a connectingrod,N, the other end of said rod being pivoted to an arm, 0, pendent fromthe rock-shaft O. The end of the rock-shaft is provided with ashippinglever, O, by turning which the shaft 0 is rocked in its bearingsaaF, secured to the frame A. The slot 2" is long enough to allow the rodJ to move endwise within the shaft I when the shipping-lever is moved torock the shaft 0'. The shaft I is prevented from moving endwise bycollars 1" I surrounding the same and secured to said shaft Ibyset-screws I I which rest against the inner walls of the frame A. Thepinion H has secured to it, concentrically therewith, a disk, H, inshape like the frustum of a cone, and forming one of the parts of afriction-clutch. The other part of said clutch H has a hollow cone,adapt-ed to receive and fit the part H. The part H is also provided withradial teeth, which engage with a pinion, P, secured by a spline, p, tothe main shaft Q. To the main shaft Q is also secured a drivingpulley,R. Vhen the clutch H H is coupled, the rotation of the shaft Q causesthe gear G to rotate in the direction shown by its arrow in Fig. 1, andgives the feeding or forward mot-ion to the platen. On the other end ofthe shaft I is another friction-clutch, consisting of a disk, H securedby a spline to the hollow shaft I, and outside of this slides aband-pulley, H, provided with a hollow conical opening, adapted toreceive and fit said disk H. The pulley H" is driven in the samedirection as the driving-pulley It, both being driven by open belts froman overhead counter shaft (not shown) in the usual manner. The clutcheson the shaft I are never both coupled at the same time. The clutches onthe shaft I, considered merely as clutches, are substantially alike, andmay be of any wellknown form of friction-clutch, which depends wholly orpartly for its operation on the friction between two surfaces. Outsideof each clutch a hub, h h, surrounds and slides on the hollow shaft I.Each of these hubs is provided with radial slots, in which are pivotedbell-crank levers h if, the outer ends of said levers being nearlyparallel with the axis of the shaft Iand resting upon cams J J securedto the outer end of the rod J by screws passing through said cams intothe ends of said shaft, each of these cams being a tapering sleevehaving a closed outer end, their outer ends being the larger ends. It isapparent that when the rod J is moved to the right in Fig. 2, the cam J2 will be drawn out from under the outer ends of the levers h h, and thecam J will at the'same time be drawn under the outer ends of the leversh h at the other end of said rod J. The inner ends of said levers h hare each nearly in contact with the surface of the shaft I, the innerarms of said levers being about radial to said shaft I. The shaft I isprovided near each end with an external screw-thread, i i. Internallythreaded collars i i surround said shaft I, and engage with the externalscrew threads thereof. The collars i i are split radially at one side,and a screw, i (see Fig. 4,) in each collar draws the sides of the slitthus formed together, tomake said collars immovable upon the shaft I.When the screws 13 are loosened, the collars may be readily adjustedtoward or from the ends of the shaft I, to vary the closeness of contactbetween the parts of the friction'clutches, said collars being adaptedto be struck by the inner ends of the levers h h when the outer ends ofsaid levers are thrown outward by the sliding of said rod J and cams JJ". It follows that sliding the rod J to theright in Fig. 2, and liftingthe outer ends of the levers h h at the left away from the shaft I, willcause the inner ends of said levers to strike said collar i and willforce the hollow outer part of the clutch at the left of the machine tothe right and cause it to engage with its counterpart by crowding thehub 7f against said outer part of said clutch. It is also evident thatsliding the rod J to the left will couple the clutch at the right of themachine and uncouple the clutch at the left thereof also that throwingthe upper end of the shipping-lever 0* forward will cause the machine tohave its operative or planing motion, and that throwing the upper end ofsaid shipping-lever backward will cause the platen to have a returnmotion. The shipping-lever O is provided with dogs 0 O, lying out of thesame vertical plane. The platen is provided with two dogs, B B arrangedand adjusted in the usual manner, so that when the platen has reachedthe end of its advance or planing motion the platendog nearest the frontend of the platen will strike the rear lever-dog and throw the upper endof the shipping-lever backward and reverse the motion of the'platen.WVhen the platen has reached the end of its return or reverse motion,the rear platen-dog will strike the front lever-dog and throw the upperend of the shipping-le ver forward and cause the platen to advance.

I claim as my invention 1. The combination, in a planing-machine, of aplaten provided with a rack, a shaft pro vided with a pinion engagingsaid rack and with a gear, another shaft having a pinion secured theretoand engaging with said gear, said last-named pinion forming part of afriction-clutch, the other part of said clutch sliding and turningfreely on said last named shaft, and automatic mechanism, substantiallyas described, for engaging and disengaging the parts of said clutch, asand for the "purpose specified.

2. The combination, in a planing-machine, of a platen provided with arack, a shaft provided with a pinion engaging said rack, and with agear, another shaft having a pinion secured thereto and engaging withsaid gear, said last-named pinion forming a part of a friction-clutch,the other part of said friction clutch sliding and turning freely onsaid lastnamed shaft, another frlChlOIl-(llltfih one part of which issecured to and turns with said last-named shaft, and the other part ofwhich clutch slides and turns freely on said last named shaft, themovable parts of said clutches being adapted to rotate constantly inopposite directions, and automatic mechanism, sub

stantially as described, for simultaneously coupling one and uncouplingthe other of said clutches, to reverse the motion of said platen, as andfor the purpose specified.

3. The combination, in a planing-machine, of a platen having a rack, ashaft provided with a pinion engaging said rack, said shaft being alsoprovided with a gear, a drivingshaft provided with a pinion, and a trainof gears connecting said last-named pinion and said first-named gear, areversing-shaft rotating with one of the intermediate gears of saidtrain in the same direction with that of said driving-shaft, andautomatic mechanism, substantially as described, for connecting anddisconnecting said driving shaft pinion and the intermediate gear ofsaid reversing-shaft, as and for the purpose specified.

4E. The combination, in a planing-machine, of a platenactuating shaftprovided with a gear, a driving-shaftprovided with a pinion, a train ofgears connecting said first-named gear and said pinion, areversing'shaft carrying an intermediate gear of said train, andautomatic mechanism,substantially as described, for simultaneouslyreversing the motion of said reversing-shaft and for disconnecting thepinion of said drivingshaft and said intermediate gear, as and for thepurpose specified.

5. The combination of the platen resting upon a suitable bed and capableof sliding thereon and provided with a rack, a platenactuatingshaft-provided with a pinion engaging said rack and with a gear, areversingshaft provided with friction-clutches, one part of each of saidclutches being secured to said reversing-shaft and rotating therewith,the other part of said friction-clutch being free to turn and slide onsaid reversing-shaft to engage with or be disengaged from the fixed partof said clutch, the fixed part of one of said clutches engaging withsaid gear, the movable parts of said clutches being adapted to berotated constantly in opposite directions, said reversing-shaft beinghollow and provided with longitudinal slots, 2. rod sliding in saidhollow shaft and projecting from the ends thereof, cams secured to theouter ends of said rod and adapted to close said clutches, a bellcranklever having a forked arm, a rock-shaft,

said shaft provided with a down-hanging arm with a shipping-lever, a rodconnecting said down-hanging arm and said forked beltcrank lever, theforked arm of which extends on opposite sides of said hollow shaft andengages with a collar, and a pin driven through said collar and throughthe longitudinal slots in said hollow shaft andinto said sliding rod, asand for the purpose specified.

6. The combination of the platen resting upon a suitable bed and capableof sliding thereon and provided with a rack, a platenactuating shaftprovided with a pinion engaging said rack and with a gear, a reversingshaft provided with friction-clutches, one part of each of said clutchesbeing secured to said reversing-shaft and rotating therewith, the otherpart of said friction-clutch being free to turn and slide on saidreversing-shaft to engage with or be disengaged from the fixed part ofsaid clutch, the fixed part of one ofsaid clutches engaging with saidgear, the movable parts of said clutches being adapted to be rotatedconstantly in opposite directions, said reversingshaft being hollow andprovided with longitudinal slots, a rod sliding in said hollow shaft andprojecting from the ends thereof, cams secured to said outer ends ofsaid rod and adapted to close said clutches, a bell-crank lever having aforked arm, a rock-shaft provided with a down-hanging arm and with ashipping-le- Ver, a rod connecting said downhanging arm and said forkedbell-crank lever, the forked arm of which extends on opposite sides ofsaid hollow shaft and engages with a collar sliding thereon, a pindriven through said collar and through the longitudinal slots in saidhollow shaft into said sliding rod, said shipping-lever being providedwith dogs lying in different vertical planes, and said platen beingprovided with dogs, one of which is adapted at each end of the traverseof said platen to strike one of the dogs on said shipping-lever, andthereby to change the direction of the motion of said platen, as and forthe purpose specified.

ALFRED CL ARKE.

\Vitnesses:

ALBERT M. Moonn, GERTRUDE M. DAY.

